Authenticity reference

Engine block application code

numbers matching · documented

1976 Pontiac Firebird Trans Am 455 exterior with the hood raised; exact-year 455 model context, not four-speed or individual-car authentication evidence. 1976 Pontiac Firebird Trans Am 455 4-Speed

Reference Details

Common issue: Service replacement or swapped 455 engines may not carry the WX stamp or matching unit number.
Confidence: documented
Correct value: WX listed for 1976 L75 455 manual-transmission application
Where to check: Engine ID stamping pad on Pontiac V8 block

Cars With This Authenticity Marker

1 linked car page.

1976 Pontiac

1976 Pontiac Firebird Trans Am 455 4-Speed

1976

Sources & Documentation

Tran-Zam.com 1976 Firebird Engines and Transmissions